1. Open Thunderbird
• Launch the Thunderbird application on your computer.
2. Access Account Settings
• Click on “Tools” in the top menu (in newer versions, this may be under the “☰” menu).
• Select “Account Settings”.
3. Select the Appropriate Account
• On the left-hand side, you will see a list of your email accounts.
• Choose the account for which you want to change the signature.
4. Edit Your Signature
• In the main window, find the field labeled “Attach a signature from a text file” or “Signature text”.
• Here, you can:
• Directly type your signature (e.g., name, position, contact details).
• Alternatively: Enable the “Use HTML” checkbox to add formatted signatures (e.g., with links or images).
5. Use a Signature File (Optional)
• If you want to use a pre-made signature file:
• Check the box “Attach the signature from a file instead”.
• Click “Choose…” to browse and select your file.
• Supported formats include .txt, .html, and .htm.
6. Save Changes
• Close the Account Settings window. Your changes are saved automatically.
7. Test Your Signature
• Compose a new email to ensure that your signature appears as expected.